参数估计方法确定柴油机燃烧速度的研究

STUDY ON THE DETERMINATION OF THE HEAT RELEASE RATE OF DIESEL ENGINE BY THE METHOD OF PARAMETER ESTIMATION

提出了一种利用实测柴油机功率、油耗等性能参数确定柴油机双韦伯函数燃烧速度的参数估计方法。该方法以参数化的理论模型得出的预测值与柴油机性能参数的实测值最接近为目标函数确定双韦伯函数中的常数。针对这一多参数、非线性的优化问题的特点，综合运用了模拟退火法、单纯形法和均匀设计法对问题进行了求解，得到了满意的结果。

A method of parameter estimation is proposed for the determination of heat relea se rate of the dual-Weiber function of diesel engine by the performance parameters measured of the diesel engine.This method determines the constants in the dual-Weiber function by making the closest between the measure data and model predictions.For the character of the nonlinear multi-parameter optimization problem,the method of simulated annealing,downhill simplex and uniform design are used to solve this problem.Example studies show that the results are satisfactory